Regioselective C−H Xanthylation as a Platform for Polyolefin Functionalization

作者：Jill B. Williamson, William L. Czaplyski, Erik J. Alexanian, Frank A. Leibfarth · 发表于：Angewandte Chemie International Edition · 年份：2018 · DOI：10.1002/anie.201803020 · 被引用次数：98 · 研究领域：Organometallic Complex Synthesis and Catalysis、Carbon dioxide utilization in catalysis、Catalytic Cross-Coupling Reactions

Polyolefins that contain polar functional groups are important materials for next-generation lightweight engineering thermoplastics. Post-polymerization modification is an ideal method for the incorporation of polar groups into branched polyolefins; however, it typically results in chain scission events, which have deleterious effects on polymer properties. Herein, we report a metal-free method for radical-mediated C-H xanthylation that results in the regioselective functionalization of branched polyolefins without coincident polymer-chain scission. This method enables a tunable degree of polymer functionalization and capitalizes on the versatility of the xanthate functional group to unlock a wide variety of C-H transformations previously inaccessible on branched polyolefins.